نتایج جستجو برای: photoplethysmography

تعداد نتایج: 1059  

2016
Siqi Liu Pong C. Yuen Shengping Zhang Guoying Zhao

2017
Xiaohua Wu Xin Li Yulin Xu Lang Zhang

Heart rate measurement is important for monitoring people’s phys‐ iological and body state. In this paper, a heart rate measurement methodology based on PhotoPlethysmoGraphy (PPG) signal is proposed. Human face positions are detected and tracked in real time by using facial color videos taken from cameras by non-contact shooting. Signals containing pulse components are extracted from images of ...

2012
A. A. Sagaidachnyi D. A. Usanov A. V. Skripal A. V. Fomin Valery V. Tuchin Elina A. Genina

Interrelation of skin temperature and blood flow oscillations of fingers under normal conditions in healthy subjects has been investigated. Oscillations of a blood flow were measured by means of photoplethysmography; oscillations of a temperature were registered by means of thermal imaging camera. The method of blood flow reconstruction by temperature oscillations with the use of the Pennes bio...

2014
Kishor Kumar Adhikari Nam-Young Kim

This paper presents a compact planar triband bandstop filter (TBBSF) with compact size and high selectivity. The structure of the filter incorporates two folded trisection stepped-impedance resonators (TSSIRs). One of these resonators is designed to operate at the first and third center frequencies and the other resonator is designed to operate at the second center frequency of the proposed fil...

Journal: :Arquivos brasileiros de cardiologia 2008
Marcos Doederlein Polito Roberto Simão Vitor Agnew Lira Antônio Cláudio Lucas da Nóbrega Paulo de Tarso Veras Farinatti

BACKGROUND The strength training can promote significant cardiovascular responses during its performance and it is interesting to devise strategies to reduce them, without compromising the strength production. OBJECTIVE To compare the acute cardiovascular responses of systolic arterial pressure (SAP), diastolic arterial pressure (DAP), heart rate (HR) and double product (DP) during the unilat...

2017
Pekka Talke

Introduction. Intraoperative stress responses and postoperative pain can be monitored using photoplethysmography (PPG). PPG signal has two components, AC and DC. Effects of noxious stimuli-induced stress responses have not been studied on the DC component of PPG. The aim of this study was to investigate the effect of a known noxious stimulus (endotracheal intubation) on both the AC and DC compo...

2016
Igor S Sidorov Roman V Romashko Vasily T Koval Rashid Giniatullin Alexei A Kamshilin

We recently pointed out the important role of dermis deformation by pulsating arterial pressure in the formation of a photoplethysmographic signal at green light. The aim of this study was to explore the role of this novel finding in near-infrared (NIR) light. A light-emitting diode (LED)-based imaging photoplethysmography (IPPG) system was used to detect spatial distribution of blood pulsation...

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